DTC P1DA0

DTC P1DA0:  VCU Inverter Temperature Sensor Circuit Low

General Description 

Courtesy of HONDA, U.S.A., INC.

The power control unit (PCU) monitors the IGBT chip temperature sensor value to prevent malfunction of the chip due to heat generation. If the IGBT chip temperature sensor output voltage is a specified voltage for a specified time, the motor control module in the PCU detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type 

Execution	Continuous
Sequence	None
Duration	90 milliseconds or more
DTC Type	One drive cycle, MIL on, POWER SYSTEM indicator on

Enable Conditions 

Condition	Minimum	Maximum
12 volt battery voltage	8 V	-

Malfunction Threshold 

The IGBT chip temperature sensor output voltage is less than 1.46 V for at least 90 milliseconds.

Possible Cause 

NOTE:  The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

• PCU internal failure

Diagnosis Details 

Conditions for setting the DTC 

When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the motor control module memory.

Conditions for clearing the DTC 

The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.